48 lines
1.2 KiB
Go
48 lines
1.2 KiB
Go
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
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// See LICENSE.txt for license information.
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package model
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import (
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"regexp"
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"strings"
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)
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var atMentionRegexp = regexp.MustCompile(`\B@[[:alnum:]][[:alnum:]\.\-_:]*`)
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const usernameSpecialChars = ".-_"
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// PossibleAtMentions returns all substrings in message that look like valid @
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// mentions.
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func PossibleAtMentions(message string) []string {
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var names []string
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if !strings.Contains(message, "@") {
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return names
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}
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alreadyMentioned := make(map[string]bool)
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for _, match := range atMentionRegexp.FindAllString(message, -1) {
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name := NormalizeUsername(match[1:])
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if !alreadyMentioned[name] && IsValidUsernameAllowRemote(name) {
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names = append(names, name)
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alreadyMentioned[name] = true
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}
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}
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return names
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}
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// TrimUsernameSpecialChar tries to remove the last character from word if it
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// is a special character for usernames (dot, dash or underscore). If not, it
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// returns the same string.
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func TrimUsernameSpecialChar(word string) (string, bool) {
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len := len(word)
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if len > 0 && strings.LastIndexAny(word, usernameSpecialChars) == (len-1) {
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return word[:len-1], true
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}
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return word, false
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}
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